Feu-follet

According to one legend the feu-follet is actually the spirit of dead man who was rejected at heaven's gate and sent back to earth to perform penance. Angry that he couldn't get into heaven, he instead decided to take out his anger by tricking the living by holding a light out in the bayou to lead them off safe paths. If you followed the feu-follet you would become lost until daylight, if you managed to make it to morning.